Qunin, Yaoshu (also Main, techn,iques for the Welfare of the People ) is the most completely preserved of the anaent Chinese agricul-tural texts, and was written by the Northern Wei Dy-nasly offcial Jia Sixie. The book is believed to have been completed in the second year of Wu Ding of Eastern Wei, namely in 544, while anolher account gives the completion belween 533 and 544. The text of the book is divided into ten volumes and 92chapters, and records 1500-year-old Chinese ag-ronomy, horticulture, afforestation, sericulture, an-imal husbandry, veterinanlt medicine, breeding,brewing, cooking, storage,as well as remedies for barren land.The book quoted nearly 200 ancient books.Important agricultural books such as Fansheng Zhishu and Simin Yueling from the Han and Jin Dynasties are now lost, so future genera-tions can only understand the operation of agriculture at the time from this book.Since the publication of the book, historical Chinese govemments have long otto-ched great importance to it. Since the book spread overseas, it has also often been considered a classic to study changes in the ancient species. When Charles Datwin was researching the theory of evolution, he made reference to an encyclopedia of anaent China. It is said that the book he referred to was in fact Qimin, Yaoshu .The book's name Qimin, Yaoshu can be explained as techniques by which common peo-ple make their livelihood, and also be explicated as techniques to harness the people's livelihood.